Workaround for spurious test failures in 5.18+

http://www.cpantesters.org/cpan/report/2b9c709c-6c02-1014-88a4-e36fdb05e747
http://www.cpantesters.org/cpan/report/fa7715e0-fc2f-11e2-862e-5f588eff5341
Update Changes & dist.ini for new timestamps

Test::CheckChanges has now started complaining about the timestamps.
Changing this format to keep it happy.
Changes/README.md updates for 0.012 release